Method and apparatus for performing CSI report in NR V2X
Based on an embodiment of the present disclosure, provided is a method for performing sidelink communication by a first device. The method may comprise: receiving, from a second device, a CSI-RS; transmitting, to a base station, a SR or a BSR, based on triggering of sidelink CSI MAC CE transmission to the second device by channel-related information measured based on the CSI-RS; receiving, from the base station, a sidelink grant related to the SR or the BSR; and canceling the triggered sidelink CSI MAC CE transmission to the second device, based on a latency bound related to the sidelink CSI MAC CE transmission and a time period based on the sidelink grant for the sidelink CSI MAC CE transmission.
1. A method for performing sidelink (SL) communication by a first device, the method comprising:
receiving, from a second device, information regarding a latency bound of SL channel state information (CSI) reporting, wherein a latency bound is maintained for each PC5 radio resource control (RRC) connection;
triggering SL CSI reporting related to a PC5 RRC connection among multiple PC5 RRC connections;
receiving, from the second device, a CSI-reference signal (RS) related to the SL CSI reporting; and
transmitting, to a base station, a scheduling request (SR) for requesting a resource for the SL CSI reporting, based on that transmission of the SL CSI reporting with at least one SL grant cannot fulfil the latency bound of SL CSI reporting.
2. The method of claim 1 , wherein the multiple PC5 RRC connections are established with a second device.
3. The method of claim 1 , wherein the latency bound is maintained for the PC5 RRC connection.
4. The method of claim 1 , wherein the transmission of the SL CSI reporting with the at least one SL grant which cannot fulfil the latency bound of SL CSI reporting indicates that no SL grant for transmission of the SL CSI reporting is within the latency bound of SL CSI reporting.
5. The method of claim 1 , wherein the first device is configured with SL resource allocation mode in which the base station schedules an SL communication.
6. The method of claim 1 , further comprising:
determining that the transmission of the SL CSI reporting with the at least one SL grant cannot fulfil the latency bound of SL CSI reporting.
7. The method of claim 1 , further comprising:
receiving, from the base station, a SL grant.
8. The method of claim 7 , further comprising:
canceling the triggered SL CSI reporting, based on that the SL grant cannot fulfil the latency bound of SL CSI reporting.
9. The method of claim 1 , further comprising:
canceling the triggered SL CSI reporting, based on an expiration of the latency bound of SL CSI reporting.
10. The method of claim 1 , further comprising:
generating a SL CSI reporting medium access control (MAC) control element (CE) based on the CSI-RS.
11. A first device adapted to perform sidelink (SL) communication, the first device comprising:
at least one transceiver;
at least one processor; and
at least one memory connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
receiving, from a second device, information regarding a latency bound of SL channel state information (CSI) reporting, wherein a latency bound is maintained for each PC5 radio resource control (RRC) connection;
triggering SL CSI reporting related to a PC5 RRC connection among multiple PC5 RRC connections;
receiving, from the second device, a CSI-reference signal (RS) related to the SL CSI reporting; and
transmitting, to a base station, a scheduling request (SR) for requesting a resource for the SL CSI reporting, based on that transmission of the SL CSI reporting with at least one SL grant cannot fulfil the latency bound of SL CSI reporting.
12. The first device of claim 11 , wherein the multiple PC5 RRC connections are established with a second device.
13. The first device of claim 11 , wherein the latency bound is maintained for the PC5 RRC connection.
14. The first device of claim 11 , wherein the transmission of the SL CSI reporting with the at least one SL grant which cannot fulfil the latency bound of SL CSI reporting indicates that no SL grant for transmission of the SL CSI reporting is within the latency bound of SL CSI reporting.
15. The first device of claim 11 , wherein the first device is configured with SL resource allocation mode in which the base station schedules an SL communication.
16. A processing device adapted to control a first device, the processing device comprising:
at least one processor; and
at least one memory connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
receiving, from a second device, information regarding a latency bound of SL channel state information (CSI) reporting, wherein a latency bound is maintained for each PC5 radio resource control (RRC) connection;
triggering SL CSI reporting related to a PC5 RRC connection among multiple PC5 RRC connections;
receiving, from the second device, a CSI-reference signal (RS) related to the SL CSI reporting; and
transmitting, to a base station, a scheduling request (SR) for requesting a resource for the SL CSI reporting, based on that transmission of the SL CSI reporting with at least one SL grant cannot fulfil the latency bound of SL CSI reporting.
17. The first device of claim 16 , wherein the multiple PC5 RRC connections are established with a second device.
18. The first device of claim 16 , wherein the latency bound is maintained for the PC5 RRC connection.
19. The first device of claim 16 , wherein the transmission of the SL CSI reporting with the at least one SL grant which cannot fulfil the latency bound of SL CSI reporting indicates that no SL grant for transmission of the SL CSI reporting is within the latency bound of SL CSI reporting.
20. The first device of claim 16 , wherein the first device is configured with SL resource allocation mode in which the base station schedules an SL communication.